Yamaha Apex with MPI Supercharger Air/Fuel Ratio?

[Sledingtime]

I recently purchased my first sled and am wondering what I should be trying to get for an air/fuel ratio.

Ive only taken it out once so far and was averaging about 14.7 it would go above 15 and drop to 13 now and then. We were riding at about 2500 feet. Some suggested replacing the O2 sensor which I did. Have not ridden it again but did start it up and am now showing much richer then before. Now I just need to confirm what my AFR should be at?
I am running about 5 lbs of boost.

I read somewhere that on a Apex turbo the following numbers were ok:

Idle = 14.5
Engagement = 13.5
0 lbs boost = 13.0
5 lbs boost = 12.5

Is this the highest you would want to be at these levels?

 

[Barry Barton]

I recently purchased my first sled and am wondering what I should be trying to get for an air/fuel ratio.

Ive only taken it out once so far and was averaging about 14.7 it would go above 15 and drop to 13 now and then. We were riding at about 2500 feet. Some suggested replacing the O2 sensor which I did. Have not ridden it again but did start it up and am now showing much richer then before. Now I just need to confirm what my AFR should be at?
I am running about 5 lbs of boost.

I read somewhere that on a Apex turbo the following numbers were ok:

Idle = 14.5
Engagement = 13.5
0 lbs boost = 13.0
5 lbs boost = 12.5

Is this the highest you would want to be at these levels?

I have a new s/c apex and have been told not to take any specs of a turbo charged apex because their # are way different than our s/c sleds. Call darren at e&s and he will help u with what u need, I don't have a o2 senser on my sled so I can't help u their.